Verb. A "Bear Trap" is performed when one guy walks up to his friend, and, instead of conventionally punching his friend in the nuts, surprises him by clenchingonto one's testicles and twisting and crushing said gonads. -WARNING: Considered VERY painful, somewhat homosexual, and highly unsuggested to be performed upon chicks. Yeah... bad idea.
"I made a bet with my friend Josh, and he has two days to pay me back that5 spot I loaned him or I get to bear trap the holy f#$%ingJesus out of him... unresisted! Sweet!"-Me